import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
@WebServlet("/writer")
public class Writer extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        resp.setContentType("text/http;charset=utf-8");
        String message=req.getParameter("message");
        ServletContext context=this.getServletContext();
        context.setAttribute("message",message);
        resp.getWriter().write(message+"设置成功");
    }
}
